Computer Hardware Terms, Glossary and Dictionary

Erasable Programmable Read-Only Memory (EPROM) is a type of computer memory chip that retains its data when its power supply is switched off. It is an array of floating gate transistors individually programmed by an electronic device that supplies higher voltages than those normally used in electronic circuits. Once programmed, a EPROM can be erased only by exposing it to strong ultraviolet light. EPROMs are easily recognisable by the transparent window on the top of the package, through which the silicon chip can be seen, and which admits UV light during erasing. To write to and erase a EPROM, you need a special device called a PROM programmer or PROM burner.

Related Terms

EPROM: Erasable Programmable Read-Only Memory